Was the battle of iwo jima over after us troops raised the flag on mt. suribachi?

No in fact the battle of iwo jima was not yet over even when the U.S. troops were able to take Mt. Suribachi and raise the american flag they still had a lot of the island to take control of and here's another fact 3 of the 4 flag raisers eventually died after the raising of the flag on the island. hope this helps.